Lock for elevator-doors.



A. W. HUBERS.

' LOOK FOR ELEVATOR DOORS. APPLIQATION FILED SEPT. 1, 1909.

973,275. I Patented 0c't,18,1910.

ALBERT W. HUBERS, OF BALTIMORE, MARYLAND.

LOCK FOR ELEVATOR-DOORS.

Specification of Letters Patent.

Patented Oct. 18, 1916.

Application filed September 1, 1909. Serial No. 515,631.

To all whom 'it may concern:

Be it known that I, ALBERT WV. I-IUBnRs, a citizen of the United States,residing at Baltimore, in the State of Maryland, have invented certainnew and useful Improvements in Looks for Elevator-Doors; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to elevators and has special reference to a novelform of door lock for elevator shafts which is so arranged that the doorcannot be opened until the door of the elevator is level withthe-building floor whereon said door is located.

One object of the invention is to improve the general construction ofdevices of this character.

Another object of the invention is to provide a device of this characterwhich will operate in an entirely automatic manner and Withoutshock orjar.

lVith the above and other objects in view the invention consists ingeneral of certain mechanism arranged to releasably look a door heldadjacent said door in an elevator shaft and other mechanism carried bythe elevator car arranged to release the first mentioned mechanism andpermit the door to open.

The invention further consists in certain novel details of constructionand combinations of parts hereinafter fully described, illustrated inthe accompanying drawings, and specifically set forth in the claim.

In the accompanying drawings, like characters of reference indicate likeparts in the several views, and Figure 1 is a top plan view of a doorframe and a portion of an elevator car equipped with this invention.Fig. 2 is a section on the line 22 of Fig. 1.

The invention embodies a latch for holding the door of the elevatorshaft closed until such time as the elevator car has reached the levelof the landing, the latch being then operated to release the door andpermit of its being opened. This latch is clearly shown in the drawingsas comprising a pivoted latch member 10 which is mounted upon the uppertrack in which the door slides and which is formed along a portion ofone edge with a lip 11 and adjacent one end with a notch 12 in which apin 13 upon the door normally engages, it being understood that the dooris held against movement to open position by reason of such engagementof the pin 13 with the notch 12. It 1s to be further understood that thenotch 12 is formed in the free end of the latch member 10 so that thisnotch may be moved into or out of the path of the pin. The latch member10 is normally held in operative position by means of a leaf spring 14;fixed at one of its ends to a post 15 supported on the door frame andguided at its opposite end through a slot formed in a similar post 16,both posts being arranged upon theupper face of the upper track in whichthe door slides. This upper track is here indicated as a portion of theframe by. the numeral 17. At 18 is a portion of an elevator car. The lip11 is formed at its edge with a shoe 19 which projects above and belowthe latch member and is curved at its upper and lower ends, this shoebeing designed to be engaged by a roller 20 Sup ported in brackets 21upon the elevator car and so positioned that the engagement takes placewhen the car floor is in a plane with the landing floor. The engagementof this roller with the shoe serves to force the latch member to thedotted line position shown in Fig.1, and in doing so, the pin 13 becomesdisengaged from the notch 12 in the latch member and the door may beslid to open position, the hereinbefore mentioned instrumentalitiesoperating as described. It will be obvious that as the elevator movesaway from the landing the spring will serve to return the latch to thefull line position so that as the door is shut the pin is engaged by thenotch. There has thus been provided a simple and eflicient device of thekind described and for the purpose specified.

It is obvious that minor changes may be made in the form andconstruction of this invention without departing from the materialprinciples thereof. It is not therefore desired to confine the inventionto the exact form herein shown and described, but it is wished toinclude all such as properly come within the scope of the appendedclaim.

Having thus described the invention, what is claimed as new, is

In a device of the kind described, a door frame, a rigid latch havingone end carried on a vertical pivot connected to the door frame wherebythe latch moves in a hori zontal plane, a door, means on said doorengageable with said latch, a shoe formed on end slidably received inthe slot ofthe other 10 said latch member and provided with inpost, saidspring being bowed in the center curved ends, an elevator car, means onsaid to rest against said latch.

car to engage the shoe as the car comes op- In testimony whereof, IaffiX my signaposite the door, a pair of posts carried on ture, inpresence of two witnesses.

said frame behind the ends of said latch, ALBERT W. HUBERS. said postsbeing provided with slots extend- Witnesses:

ing therethrough, and a spring fixed to one ALBERT W. ScHENoK,

of said posts at one end and having its other. GOLDIE V. HINES.

